CN215606600U

CN215606600U - Artificial vertebral lamina

Info

Publication number: CN215606600U
Application number: CN202121348843.2U
Authority: CN
Inventors: 沈建雄; 许书富; 田娜; 任晓颖; 董骧
Original assignee: Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-25
Anticipated expiration: 2031-06-17

Abstract

The utility model discloses an artificial vertebral lamina, which belongs to the technical field of orthopedic implants.A vertebral lamina body of the artificial vertebral lamina is arched in cross section, notches are arranged at the upper end and the lower end of the vertebral lamina body, and can be used for clamping and fixing spinous processes of upper and lower vertebral bodies to stabilize the vertebral column, and the self-stabilization of the artificial vertebral lamina can be realized without using screws, winding and other modes; vertical convex teeth can be arranged in the concave opening to further improve the stability. The middle part of the outer surface of the vertebral plate body is provided with a transverse reinforcing rib, so that the strength of the artificial vertebral plate can be improved. The artificial vertebral plate can rebuild the integrality of the vertebral canal, prevent spinal cord adhesion, increase the area of the bone grafting bed and promote spinal fusion. In order to facilitate processing and manufacturing, the artificial vertebral plate can be an integrated structure printed in 3D. The whole vertebral plate body can be made of absorbable materials, and the absorbable materials are at least one of bioactive glass, poly-L-lactic acid, poly-D-lactic acid and polycaprolactone, so that biocompatibility and fusion effect are improved.

Description

Artificial vertebral lamina

Technical Field

The utility model relates to the technical field of orthopedic implants, in particular to an artificial vertebral plate.

Background

The artificial vertebral plate is used for reconstruction after vertebral plate excision in spinal surgery, and is used as an artificial implant for implantation and repair of the excision or deletion part when vertebral arch of human body is excised or lost due to other reasons such as pathological changes.

The existing artificial vertebral plate is usually fixed by using screws, winding wires and other modes, and the fixing mode causes complicated operation process and inconvenient operation; in addition, the existing artificial vertebral plate is mostly designed by adopting a straight plate, the configuration is simpler, and the strength is to be enhanced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an artificial vertebral plate which is simple in operation, simple and convenient to operate and high in strength.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides an artificial vertebral plate, includes the vertebral plate body, the cross section of vertebral plate body becomes the arch, the upper end and the lower extreme of vertebral plate body are equipped with respectively and are used for the card to connect the notch of upper vertebral body spinous process and lower vertebral body spinous process, the surface middle part of vertebral plate body is equipped with horizontal strengthening rib.

Further, the notch is a V-shaped notch.

Furthermore, the vertebral plate body is of a porous structure, and/or the transverse reinforcing rib is of a solid structure.

Further, the porosity of the porous structure is 30-70%.

Further, the pore diameter of the porous structure is 300-600 μm.

Furthermore, the artificial vertebral plate is an integrated structure formed by 3D printing.

Furthermore, vertical convex teeth are arranged in the notches.

Furthermore, the whole artificial vertebral plate made of absorbable materials is arranged on the vertebral plate body.

Furthermore, the absorbable material is at least one of bioactive glass, poly-L-lactic acid, poly-D-lactic acid and polycaprolactone.

The utility model has the following beneficial effects:

according to the artificial vertebral lamina, the vertebral lamina body is designed in an arched shape, the physiological morphological structure characteristics of a human vertebral lamina are met, the volume of a medullary cavity can be effectively increased, the notches at the upper end and the lower end can be clamped and fixed with the spinous processes of the upper vertebral body and the lower vertebral body, the vertebral column is stabilized, and the self-stabilization of the artificial vertebral lamina can be realized without screws, winding and other modes. Meanwhile, the middle part of the outer surface of the vertebral plate body is provided with a transverse reinforcing rib, so that the strength of the artificial vertebral plate can be improved. In addition, the artificial vertebral plate can reconstruct the integrity of a vertebral canal, prevent spinal cord adhesion, increase the area of a bone grafting bed and promote spinal fusion.

Drawings

FIG. 1 is a schematic view of the medial side of one embodiment of the artificial lamina of the utility model;

FIG. 2 is a schematic lateral structural view of one embodiment of a prosthetic lamina of the present invention;

FIG. 3 is a schematic cross-sectional view of another embodiment of a prosthetic lamina of the utility model;

FIG. 4 is a schematic elevational view of another embodiment of a prosthetic lamina of the utility model.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The utility model provides an artificial vertebral plate, as shown in figures 1-4, which comprises a vertebral plate body 1, wherein the cross section of the vertebral plate body 1 is arched, notches 2 for clamping the spinous process of an upper vertebral body and the spinous process of a lower vertebral body are respectively arranged at the upper end and the lower end of the vertebral plate body 1, and a transverse reinforcing rib 3 is arranged in the middle of the outer surface of the vertebral plate body 1.

The recess 2 of the lamina body 1 is preferably V-shaped as shown in the figures to improve the snap-fit security to the spinous processes. Vertical convex teeth 5 can be arranged in the notch 2, the number of the vertical convex teeth 5 can be multiple, the vertical convex teeth 5 can penetrate into spinous processes of upper and lower vertebral bodies in the notch 2, the spinous processes are prevented from being separated, and the stability of the artificial vertebral plate is further improved.

The vertebral plate body 1 can be of a porous structure, and/or the transverse reinforcing ribs 3 are of a solid structure.

Therefore, when the vertebral plate body is of a porous structure, the porous structure has a large number of pores, so that the bone ingrowth can be better promoted; the transverse reinforcing rib can also be of a porous structure to promote bone ingrowth and also can be of a solid structure to improve the strength of the artificial vertebral plate.

Preferably, the porosity of the porous structure is 30 to 70%, and the pore diameter of the porous structure is 30 to 60 μm, in which case the use effect is most excellent.

For convenient manufacturing, the artificial vertebral plate is preferably a one-piece structure printed by 3D.

In addition, the whole vertebral plate body 1 can be the artificial vertebral plate of absorbable material, and the absorbable material can be at least one of bioactive glass, poly-L-lactic acid, poly-D-lactic acid, polycaprolactone to make artificial vertebral plate have good biocompatibility, improve and fuse the effect.

To enhance fusion, the lamina body 1 may include an inner layer 11 and an outer layer 12, as shown in FIG. 3, the inner layer 11 being made of an absorbable material and the outer layer 12 being made of porous bioglass.

Therefore, the artificial vertebral plate adopts a double-layer design, so that the sufficient strength is ensured, the inner layer is made of absorbable materials, the biocompatibility is good, and the good fusion effect after the operation is provided; the outer layer is made of porous bioglass, which plays a role in promoting the proliferation, differentiation and osteogenesis of human mesenchymal stem cells, and the porous bioglass has a large number of pores, can better promote bone growth and does not generate rejection reaction.

The absorbable material used for the inner layer 11 is preferably polylactic acid (PLA), which is a polyester polymer obtained by polymerizing lactic acid as a main raw material, and is a novel biodegradable material, and has the advantages of good thermal stability, convenience in processing, and the like. Meanwhile, the inner layer 11 can be made into a compact structure, thereby improving the strength of the artificial vertebral body.

As shown in fig. 3-4, in the modified embodiment of the present invention, the outer layer 12 is provided with more than two through holes 4 (the hole diameter may be 0.3-0.5mm), the inner layer 11 is connected to the outer layer 12 by a molding process, so that the inner layer 11 is all absorbable material, the outer layer 12 is porous bioglass, and the absorbable material of the inner layer 11 enters the outer layer 12 along the through holes 4, and the inner layer and the outer layer are embedded, which can greatly improve the strength of the artificial vertebral plate and has a more stable structure.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides an artificial vertebral lamina, includes vertebral lamina body (1), its characterized in that, the cross section of vertebral lamina body (1) becomes the arch, the upper end and the lower extreme of vertebral lamina body (1) are equipped with notch (2) that are used for the card to connect upper vertebral body spinous process and lower vertebral body spinous process respectively, the surface middle part of vertebral lamina body (1) is equipped with horizontal strengthening rib (3).

2. The artificial lamina of claim 1, wherein the recess (2) is a V-shaped recess.

3. The artificial vertebral plate according to claim 1, characterized in that said vertebral plate body (1) is of porous structure and/or said transverse reinforcement (3) is of solid structure.

4. The artificial lamina of claim 3, wherein the porous structure has a porosity of 30-70%.

5. The artificial lamina of claim 3, wherein the pore size of the porous structure is 300-600 μm.

6. The artificial lamina of claim 1, wherein the artificial lamina is a unitary structure that is 3D printed.

7. The artificial vertebral plate according to any of the claims 1 to 6, characterized in that vertical teeth (5) are provided in the recess (2).

8. The artificial vertebral plate according to any one of claims 1 to 6, characterized in that the whole vertebral plate body (1) is an artificial vertebral plate made of absorbable material.

9. The artificial lamina of claim 8, wherein the absorbable material is bioactive glass, poly (L-lactic acid), poly (D-lactic acid), or polycaprolactone.